Set it back to “easy local” then to fix your “problem”.
You can either edit the file directly with a text editor.
Or use YaST->Security and Users->Security Center and Hardening->Miscellanous->File Permission (on 13.2 at least, 11.4 might slightly differ but you should find it I suppose). Choose “Easy” there.
What did I change some setting? I don’t remmber I did.
You must have.
“easy local” is the default.
Why do this suspend come ?
Again, with “secure” settings, suspend requires the root password, and many other things too.
“secure” is not really suited for a great desktop experience, and that’s not what it aims at either.